This paper presents a novel approach to creating optically reconfigurable photonic devices using phase change materials. The authors demonstrate a method to write, erase, and rewrite optical components, such as lenses, holograms, and metamaterials, into a phase change material (Ge2Sb2Te5, GST) film using femtosecond laser pulses. This technique allows for the creation of binary and grayscale patterns with high precision and sub-wavelength resolution. The devices include a visible-range bi-chromatic Fresnel zone-plate, a super-oscillatory lens, a grayscale hologram, and a dielectric metamaterial with controllable reflection and transmission resonances. The reconfigurability of these devices is achieved through the phase transition between amorphous and crystalline states in GST, which can be induced by tailored trains of femtosecond pulses. The study highlights the potential of this technology for applications in spectroscopy, wavelength division multiplexing, adaptive optics, and more.This paper presents a novel approach to creating optically reconfigurable photonic devices using phase change materials. The authors demonstrate a method to write, erase, and rewrite optical components, such as lenses, holograms, and metamaterials, into a phase change material (Ge2Sb2Te5, GST) film using femtosecond laser pulses. This technique allows for the creation of binary and grayscale patterns with high precision and sub-wavelength resolution. The devices include a visible-range bi-chromatic Fresnel zone-plate, a super-oscillatory lens, a grayscale hologram, and a dielectric metamaterial with controllable reflection and transmission resonances. The reconfigurability of these devices is achieved through the phase transition between amorphous and crystalline states in GST, which can be induced by tailored trains of femtosecond pulses. The study highlights the potential of this technology for applications in spectroscopy, wavelength division multiplexing, adaptive optics, and more.